完全退火态40Cr钢ECAP加工后的拉伸性能  

Tensile Properties of Fully Annealed 40Cr Steel Processed by Equal-channel Angular Pressing

作　　者：吴桂潮[1] 许晓静[1] 王彬[1] 罗勇[1] 

机构地区：[1]江苏大学先进成形研究所,江苏镇江212013

出　　处：《热加工工艺》2010年第17期16-17,20,共3页Hot Working Technology

基　　金：江苏省自然基金重点项目(BK2007707);江苏大学优秀青年学术骨干培育基金(1211110001)

摘　　要：对经完全退火处理的40Cr钢在室温下实施了等效应变约为0.5的等通道转角挤压(ECAP),发现钢中铁素体晶粒高效细化(从10～50μm到1μm),珠光体组织亦发生明显的剪切变形。结果表明,经室温ECAP加工,铁素体+珠光体组织的中碳钢材料的屈服极限、抗拉强度大幅提升,塑性降低但仍保持在很高的水平。A fully annealed 40Cr steel was processed by equal-channel angular press at room temperature,with an imposed equivalent strain about 0.5.The grain size of ferrite was refined（from 10 ～50 mm to 1mm）.There was shear deformation in pearlite microstructure.The results demonstrate that the yield strength and tensile strength of 40Cr steel with ferrite-pearlite improve afterECAP.The ECAP steel has a high level of tensile ductility.

关 键 词：钢 ECAP加工 微观组织 力学性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG376[金属学及工艺—金属材料]